Karnal wrote on Dec 3
rd, 2019 at 11:59pm:
lee wrote on Dec 3
rd, 2019 at 5:29pm:
Karnal wrote on Dec 3
rd, 2019 at 5:10pm:
That's why it's scientifically proven, dear boy.
In the models only. And the models aren't science. There are too many parameters where they use "forcings".
Not in the models only, dear. If you increase CO2 levels over time, the temperature goes up, the acid levels in the sea rise, a whole range of balanced phenomena shift, like the El Niño effect between the continents, causing new weather effects and reactions.
Of course they use "models". We got to the moon using mathematics alone.
Fossil fuel emissions as the climate ‘control knob’ is a simple and seductive idea. However this is a misleading oversimplification, since climate can shift naturally in unexpected ways. Apart from uncertainties in future emissions, we are still facing a factor of 3 or more uncertainty in the sensitivity of the Earth’s temperature to increasing carbon dioxide in the atmosphere. We have no idea how natural climate variability (solar, volcanoes, ocean circulations) will play out in the 21st century, and whether or not natural variability will dominate over manmade warming.
We still don’t have a realistic assessment of how a warmer climate will impact us and whether it is ‘dangerous.’ We don’t have a good understanding of how warming will influence extreme weather events. Land use and exploitation by humans is a far bigger issue than climate change for species extinction and ecosystem health. Local sea level rise has many causes, and is dominated by sinking from land use in many of the most vulnerable locations.
We have been told that the science of climate change is ‘settled’. However, in climate science there has been a tension between the drive towards a scientific ‘consensus’ to support policy making, versus exploratory research that pushes forward the knowledge frontier. Climate science is characterized by a rapidly evolving knowledge base and disagreement among experts. Predictions of 21st century climate change are characterized by deep uncertainty.
Nevertheless, activist scientists and the media seize upon each extreme weather event as having the fingerprints of manmade climate change — ignoring the analyses of more sober scientists showing periods of even more extreme weather in the first half of the 20th century, when fossil fuel emissions were much smaller.
Alarming press releases are issued about each new climate model prediction of future catastrophes from famine, mass migrations, catastrophic fires, etc. Yet, these press releases don’t mention that these predicted catastrophes are associated with highly implausible assumptions about how much we might actually emit over the course of the 21st century. Further, issues such as famine, mass migrations and wildfires are caused primarily by government policies and ineptitude, lack of wealth and land use policies. Climate change matters, but it’s outweighed by other factors in terms of influencing human well being.
https://judithcurry.com/2019/12/02/madrid/#more-25458
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mindless hysterics from climate skeptics (Read 18673 times)
